OSS Data Shredder

Data Shredder is a free tool used to destroy files literally, free space and your Recycle Bin contents instead of only deleting them. That means your data contents once overwritten and destroyed it can't be recovered.

OSS Data Shredder 7.3.3.3000

Description : Data Shredder is a free tool used to destroy files literally, free space and your Recycle Bin contents instead of only deleting them. That means your data contents once overwritten and destroyed it can't be recovered.
Friendly interface allows performing the following operations:
1)Powerful algorithms for powerful shredding.
2)Shred files, folders, and recycle bin.
3)Shred drives empty space.
4)Built-in Scheduler.
5)Ability to shred Restore Points.
6)Context menu for file and folders, so it will be easier to shred files and folders without launching the program.
7)Intercepting the "Delete" and "Shift-Delete" windows explorer commands. So this will be like built-in shredder in the windows explorer.
Beside all of these features, it is free to download and install.